The problems historically have come from situations like:
1) Person A finds an old chassis from a 1923 Crungely-Walsingham and restores it with the chassis number 123X cos that's what is on the chassis.
2) Person B is browsing around an auto jumble and finds an old logbook from a 1923 Crungely-Walsingham and restores it with the chassis number 123X cos that's what's on the logbook.
3) Person C buys what he believes to be a 1923 Crungely-Walsingham with the chassis number 123X and pay a squillion quid for it
...and so it goes.
.
I love the Crungely-Walsinghams, especially the early ones with the Whip Snidney Brew engines Tim